package com.jurenzhao.partssystem.system.system_log.util;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;

public class Constants {

    // 当前登录用户的标识名
    public static final String CURRENT_USER = "system_users";

    public static String getIpAddr(HttpServletRequest request){
                    String ipAddress = request.getHeader("x-forwarded-for");
                    if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                        ipAddress = request.getHeader("Proxy-Client-IP");
                    }
                    if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                        ipAddress = request.getHeader("WL-Proxy-Client-IP");
                    }
                    if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                        ipAddress = request.getRemoteAddr();
                        if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                            //根据网卡取本机配置的IP
                            InetAddress inet=null;
                            try {
                    inet = InetAddress.getLocalHost();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                ipAddress= inet.getHostAddress();
            }
        }
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15
            if(ipAddress.indexOf(",")>0){
                ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }

}
